DE68914075T2 - Schutzschaltung für ein magnetoresistives Element. - Google Patents
Schutzschaltung für ein magnetoresistives Element.Info
- Publication number
- DE68914075T2 DE68914075T2 DE68914075T DE68914075T DE68914075T2 DE 68914075 T2 DE68914075 T2 DE 68914075T2 DE 68914075 T DE68914075 T DE 68914075T DE 68914075 T DE68914075 T DE 68914075T DE 68914075 T2 DE68914075 T2 DE 68914075T2
- Authority
- DE
- Germany
- Prior art keywords
- magnetoresistive element
- current
- voltage
- coupled
- protection circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000004907 flux Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000004044 response Effects 0.000 description 13
- 239000003990 capacitor Substances 0.000 description 9
- 230000001052 transient effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000009021 linear effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/04—Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/40—Protective measures on heads, e.g. against excessive temperature
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B2005/0002—Special dispositions or recording techniques
- G11B2005/0005—Arrangements, methods or circuits
- G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
- G11B2005/0013—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation
- G11B2005/0016—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation of magnetoresistive transducers
- G11B2005/0018—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation of magnetoresistive transducers by current biasing control or regulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Magnetic Heads (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/250,784 US4879610A (en) | 1988-09-28 | 1988-09-28 | Protective circuit for a magnetoresistive element |
SG150794A SG150794G (en) | 1988-09-28 | 1994-10-17 | Protective circuit for magnetoresistive element |
Publications (2)
Publication Number | Publication Date |
---|---|
DE68914075D1 DE68914075D1 (de) | 1994-04-28 |
DE68914075T2 true DE68914075T2 (de) | 1994-10-20 |
Family
ID=26664435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE68914075T Expired - Fee Related DE68914075T2 (de) | 1988-09-28 | 1989-09-20 | Schutzschaltung für ein magnetoresistives Element. |
Country Status (6)
Country | Link |
---|---|
US (1) | US4879610A (fr) |
EP (1) | EP0361781B1 (fr) |
JP (1) | JPH0772921B2 (fr) |
DE (1) | DE68914075T2 (fr) |
HK (1) | HK139294A (fr) |
SG (1) | SG150794G (fr) |
Families Citing this family (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4987514A (en) * | 1989-02-15 | 1991-01-22 | Hewlett-Packard Company | Method and apparatus for preventing parasitic electrical discharges in magnetic disk drives |
US5103353A (en) * | 1990-05-01 | 1992-04-07 | International Business Machines Corporation | Low noise amplifier with short circuit protection for signals from magnetoresistive element |
US5142425A (en) * | 1990-08-09 | 1992-08-25 | Hewlett-Packard Company | Disk drive in which magnetic head-to-disk capacitive coupling is eliminated |
US5122915A (en) * | 1990-09-26 | 1992-06-16 | Minnesota Mining And Manufacturing Company | Low-noise preamplifier for magneto-resistive heads |
US5204789A (en) * | 1991-01-31 | 1993-04-20 | International Business Machines Corporation | Low noise voltage-biasing amplifier for magnetoresistive element |
US5323278A (en) * | 1992-09-17 | 1994-06-21 | International Business Machines Corporation | Low noise amplifier circuit for magnetoresistive sensors for fast read-write switching in low supply voltage applications |
US5309295A (en) * | 1992-10-08 | 1994-05-03 | International Business Machines Corporation | Method and apparatus for biasing a magneto-resistive head |
US5296975A (en) * | 1992-10-09 | 1994-03-22 | International Business Machines Corporation | High-transition-rate, low-supply-voltage write driver circuitry for magnetic inductive write head |
MY112702A (en) * | 1992-10-30 | 2001-08-30 | Sony Corp | Reproducing circuit for a magnetic head. |
US5327303A (en) * | 1992-12-18 | 1994-07-05 | Seagate Technology, Inc. | MR preamplifier having feedback loops for minimizing differential low frequency components and regulating common mode low frequency components of the preamplifier output signal |
JPH077196A (ja) * | 1992-12-29 | 1995-01-10 | Eastman Kodak Co | 磁界センサ及び磁界検知方法 |
JP2994522B2 (ja) * | 1993-02-22 | 1999-12-27 | 富士通株式会社 | 磁気抵抗素子用プリアンプ |
US5398144A (en) * | 1993-02-25 | 1995-03-14 | Vtc Inc. | Bias generator for a low voltage differential read amplifier |
JP2553316B2 (ja) * | 1993-03-02 | 1996-11-13 | インターナショナル・ビジネス・マシーンズ・コーポレイション | データ記憶ディスク・ドライブ装置 |
BE1005586A0 (nl) * | 1993-05-10 | 1993-11-09 | Philips Electronics Nv | Optekeninrichting voorzien van een temperatuurafhankelijke schrijfstroomregeling. |
US5426542A (en) * | 1994-01-21 | 1995-06-20 | Seagate Technology, Inc. | Electronically coupled high-impedance magnetoresistive preamplifier |
US5497111A (en) * | 1994-12-22 | 1996-03-05 | International Business Machines Corporation | Peak detection circuit for suppressing magnetoresistive thermal asperity transients in a data channel |
EP0720150B1 (fr) * | 1994-12-30 | 2003-10-15 | STMicroelectronics, Inc. | Transducteur résistif symétrique, circuit de polarisation et ses procédés |
US5770968A (en) * | 1994-12-30 | 1998-06-23 | Sgs-Thomson Microelectronics, Inc. | Differential amplifier with proxy load for control of output common mode range |
US5761009A (en) * | 1995-06-07 | 1998-06-02 | International Business Machines Corporation | Having parastic shield for electrostatic discharge protection |
JP3384651B2 (ja) * | 1995-07-17 | 2003-03-10 | 富士通株式会社 | 電源制御回路及び記憶装置 |
US6057972A (en) * | 1995-11-03 | 2000-05-02 | International Business Machines Corporation | Current source for a magnetoresistive head with variability and selectable slew rate |
US5877911A (en) * | 1996-03-13 | 1999-03-02 | International Business Machines Corporation | Magneto-resistive head pre-amplifying circuit for avoiding output voltage transients |
US5995311A (en) * | 1996-04-30 | 1999-11-30 | Texas Instruments Incorporated | Head switch sequence to protect magneto-resistive (MR) head |
US5914630A (en) * | 1996-05-10 | 1999-06-22 | Vtc Inc. | MR head preamplifier with output signal amplitude which is independent of head resistance |
US5917680A (en) * | 1996-06-24 | 1999-06-29 | Read-Rite Corporation | Magnetoresistive head with magnetic bias level control |
WO1998009274A1 (fr) * | 1996-08-30 | 1998-03-05 | Marlowe Christian P | Procede et appareil d'enregistrement magnetique utilisant une decharge induite de plasma |
US5812019A (en) * | 1997-01-10 | 1998-09-22 | Vtc Inc. | Open-loop MR biasing circuit with high power supply and common mode rejection |
US6512654B2 (en) | 1997-10-03 | 2003-01-28 | Matsushita Electric Industrial Co., Ltd. | Magnetic disk driving apparatus with bearing fixed with conductive adhesive |
US6014281A (en) * | 1997-12-04 | 2000-01-11 | International Business Machines Corporation | Using a read element and a read/write coupling path to detect write-safe conditions |
US6219195B1 (en) | 1998-01-29 | 2001-04-17 | Marvell Technology Group Ltd. | Low-noise magneto-resistive amplifier using CMOS technology |
US6067220A (en) * | 1998-04-02 | 2000-05-23 | Pemstar, Inc. | Shunt for protecting a hard file head |
US6252735B1 (en) | 1999-02-25 | 2001-06-26 | International Business Machines Corporation | Voltage-biasing, voltage-sensing differential preamplifier for magnetoresistive elements |
US6687097B1 (en) | 2000-03-22 | 2004-02-03 | Pemstar, Inc. | Electrostatic protection for magnetic heads |
US7006313B2 (en) * | 2002-06-25 | 2006-02-28 | Texas Instruments Incorporated | Circuit and method to match common mode flex impedance and to achieve symmetrical switching voltage outputs of write driver |
DE10244905A1 (de) * | 2002-09-25 | 2004-04-08 | Austriamicrosystems Ag | Regelvorrichtung mit einem Regelkreis und einem Sensor und Verfahren zum Betrieb der Regelvorrichtung |
US6847501B2 (en) * | 2002-11-06 | 2005-01-25 | International Business Machines Corporation | Method and apparatus for providing matched differential MR biasing and pre-amplification |
US20050259344A1 (en) * | 2003-08-26 | 2005-11-24 | Motomu Hashizume | High output impedance biasing for magnetoresistive elements |
US7151393B2 (en) * | 2004-11-05 | 2006-12-19 | Guzik Technical Enterprises | High-speed write driver |
JP5080411B2 (ja) * | 2008-09-19 | 2012-11-21 | エイチジーエスティーネザーランドビーブイ | ディスク・ドライブ及びヘッド・スライダ上の素子のコモン電位調整方法 |
US9966094B1 (en) * | 2016-09-14 | 2018-05-08 | Marvell International Ltd. | Quadratic current slew control circuit |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0053343A1 (fr) * | 1980-11-28 | 1982-06-09 | Hitachi, Ltd. | Circuit de reproduction et d'amplification pour tête magnéto-résistive |
EP0081240B1 (fr) * | 1981-12-09 | 1989-06-28 | Matsushita Electric Industrial Co., Ltd. | Tête magnétique à films minces |
DE3435867A1 (de) * | 1984-09-29 | 1986-04-10 | Bosch Gmbh Robert | Differentialsensor |
US4712144A (en) * | 1985-08-20 | 1987-12-08 | International Business Machines Corporation | Method and apparatus for reading recorded data by a magnetoresistive head |
US4706138A (en) * | 1986-04-14 | 1987-11-10 | International Business Machines Corporation | Amplification of signals produced by a magnetic sensor |
US4786993A (en) * | 1986-06-30 | 1988-11-22 | International Business Machines Corporation | Voltage amplifier for constant voltage biasing and amplifying signals from a MR sensor |
-
1988
- 1988-09-28 US US07/250,784 patent/US4879610A/en not_active Expired - Lifetime
-
1989
- 1989-07-20 JP JP1186207A patent/JPH0772921B2/ja not_active Expired - Fee Related
- 1989-09-20 DE DE68914075T patent/DE68914075T2/de not_active Expired - Fee Related
- 1989-09-20 EP EP89309589A patent/EP0361781B1/fr not_active Expired - Lifetime
-
1994
- 1994-10-17 SG SG150794A patent/SG150794G/en unknown
- 1994-12-08 HK HK139294A patent/HK139294A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SG150794G (en) | 1995-03-17 |
EP0361781A3 (fr) | 1992-01-15 |
JPH0294103A (ja) | 1990-04-04 |
JPH0772921B2 (ja) | 1995-08-02 |
EP0361781A2 (fr) | 1990-04-04 |
US4879610A (en) | 1989-11-07 |
HK139294A (en) | 1994-12-16 |
EP0361781B1 (fr) | 1994-03-23 |
DE68914075D1 (de) | 1994-04-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B. |
|
8339 | Ceased/non-payment of the annual fee |